Self-Assembly of Photofunctional Cylindrical Nanostructures Based on Perylene-3,4:9,10-bis(dicarboximide)
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- 作者：Louise E. Sinks ; Boris Rybtchinski ; Masanori Iimura ; Brooks A. Jones ; Andrew J. Goshe ; Xiaobing Zuo ; David M. Tiede ; Xiyou Li ; and Michael R. Wasielewski
- 刊名：Chemistry of Materials
- 出版年：2005
- 出版时间：December 13, 2005
- 年：2005
- 卷：17
- 期：25
- 页码：6295 - 6303
- 全文大小：497K
- 年卷期：v.17,no.25(December 13, 2005)
- ISSN：1520-5002
文摘
A perylene-3,4:9,10-bis(dicarboximide)-based electron donor-acceptor monomer was designed to self-assemble using the synergistic effects of 
- stacking, microsegregation, and hydrogen bonding. Theresulting aggregates were characterized in solution by small-angle X-ray scattering (SAXS), while thesolid-state structure was probed by X-ray diffraction, transmission electron microscopy, and scanningelectron microscopy. The solution-phase assemblies were found to consist of 12 monomers arranged ineither a face-to-face stacked pair of hydrogen-bonded hexagonal arrays or a two-turn helix. The SAXSdata do not allow a clear distinction between these two cyclic motifs. These cyclic arrays grow to lengthsof about 1 
m and form bundles of cylindrical structures in the solid phase. Aggregation is solventdependent, with methylcyclohexane inducing aggregation and tetrahydrofuran disrupting it. The solution-phase photophysics of the dodecamer were probed by UV-vis, time-resolved fluorescence, andfemtosecond transient absorption spectroscopies, revealing that formation of the dodecamer introducesan ultrafast electron-transfer pathway that is not present in the monomer.
- stacking, microsegregation, and hydrogen bonding. Theresulting aggregates were characterized in solution by small-angle X-ray scattering (SAXS), while thesolid-state structure was probed by X-ray diffraction, transmission electron microscopy, and scanningelectron microscopy. The solution-phase assemblies were found to consist of 12 monomers arranged ineither a face-to-face stacked pair of hydrogen-bonded hexagonal arrays or a two-turn helix. The SAXSdata do not allow a clear distinction between these two cyclic motifs. These cyclic arrays grow to lengthsof about 1 m and form bundles of cylindrical structures in the solid phase. Aggregation is solventdependent, with methylcyclohexane inducing aggregation and tetrahydrofuran disrupting it. The solution-phase photophysics of the dodecamer were probed by UV-vis, time-resolved fluorescence, andfemtosecond transient absorption spectroscopies, revealing that formation of the dodecamer introducesan ultrafast electron-transfer pathway that is not present in the monomer.